Shouldn't
Couldn't (contraction for "could not")
The contraction is spelled "doesn't." The past tense is didn't.
haven't
you're
They're
contact
Yes, it is "hadn't".
It is "could've"
Couldn't (contraction for "could not")
That is the correct spelling of the contraction "could've" (could have).
The contraction is spelled shouldn't.
The correct spelling of the contraction is should've.
aren't
won't
The contraction form of who is is who's.Example: Who's at the door?
The contraction is spelled "doesn't." The past tense is didn't.
haven't